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11´ Tunnel /Yamato

Here goes an attempt to get a new class going in Mexico. So far we´ve done quite well getting the ball rolling with ModVP boats in two classes: "Formula 2000" similar to COR and "Formula 3000" with 2.5 Mercs and big OMCs... The little Jet Ski hulls running 25 HP outboards are doing ok so now I´m going for this:

Yamato 202/302/321 with no modifications on an 11´ tunnel (I own two of these and the molde). I should run the first try this weekend with an old prop 2-blade prop to see what happens. Thoughts? I love Yamatos for several reasons (price being a big factor)....

It might be the angle of the photo but it does look low? Interesting rig.
As you know with a tunnel they run the prop shaft center at the low point of the sponson bottoms or higher but can the Yamato do that and to cool at that height? With the tunnel there is flat approach water (generally) to the prop thus nil upwash like there is on a hydro that sits just a bit below the approach water level and gives prop upwash to help cool the Y's.